Objects in the image:
category: backpack
category: person
category: person
category: backpack
category: skateboard
category: skateboard
category: backpack
category: bottle
category: backpack
category: skateboard

Guessing-game dialogue about one of the objects:
q: is it person?
a: No
q: is it used by the person?
a: No
q: is it backpack?
a: Yes
q: is it backpack with white dots?
a: No
q: one near to that?
a: Yes
q: the back right side having one bottle?
a: No
q: is it black colour?
a: No
q: Is it the blue one above the black backpack?
a: Yes